Furnace coil



Dec. s, 1931. -w P, Km 1,835,711

FURNACE COIL Filed Feb. 1C, 195o zal Patented Dec. 8, 1931 eras WALTER P. KIDD, F RICHMOND, VRGINM FURNACE COIL This invention appertains to water heaters and more particularly to an improved water coil or loop for heating` furnaces.

One of the primary objects of my invention is the provision of an improved hot water -coil or loop for furnaces which is so constructed that the cold water inlet and the hot water outlet thereof can be adjusted relative t0 one another to vary the distance therebetween .whereby the inlet and outlet pipes can be readily fitted in the openings in the furnace wall provided for that purpose irrespectiveof the varying distances between said openings.

In the placing of the hot water loop or coil in furnaces considerable difficulty has been experienced by the plumbers and steam fitters in view of the fact that the openings provided in the furnace wall for the inlet and outlet pipes of the loop or coil are spaced apart different distances making` it necessary to use various types of coupling joints and sometimes making it necessary to provide another hole in the furnace wall.

It is therefore another salient obj ect of my invention to provide a hot water loop or coil embodying a pair of independent members, one of which carries the cold water inlet pipe and the other the not water outlet pipe with means whereby the members can be adjustably connected together so that the inlet and outlet pipes can be accurately set according to the space between the openings in the furnace wall.

A further object of my invention is the provision of novel means for forming the members constituting the hot water loop or coil whereby an increased radiating surface will be provided for the coil or loop to insure the proper and quick heating of the water therein and to also prevent the banking of dead ashes and coal thereabout.

A still further object of my invention is to provide an improved hot water loop or coilV for furnaces of the above character, which will be durable and efcient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost. l

With these and other objects in view, the

invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawings, in which drawings Figure 1 is a vertical longitudinal through the improved hot water loop section or coil.

Figure 2 is a horizontal section taken on the lin-e of Figure 1 illustrating mation of the upper member of the coil.

the forloop or Figure 3 is a transverse section taken on the line 3-3 of Figure 1 illustrating the formation of the lower member of the hot water loop or coil.

Referring to the drawings in detail,

wherein similar reference characters designate corresponding parts throughout the several views, theletter A generally indicafes my improved het water loop or coil for furnaces, which comprises an upper member 10 and a lower member 20.

with. The body member 10 which 12 together is of a legs so to prevent water therethrough.

connects the legs the free pas portion 15 of the upper 11 and greater diameter than the sage of This body portion 15 at adjacent parts of the lower and upper legs 12 are provided with struck out ribs 16, which radia the outer face of said member.

te from rlhese ribs 16 serve a triple function, namely first increasing the active area of the members so as to facilitate the heating of the water, second, to increasethe strength of the member, and, third, to space the coals from the memb r. rihe depending vertically disposedk leg 11 below the ribs 16 is provided with external threads 17, for a purpose,

which will be later described.

The lower member 2O is'of a subst antially U-shape in side elevation embodying the sido legs 21 and 22 and the connecting arcuate body portion 23, the lower end of which may be provided with a drain opening 24;.

Y This drain opening receives a suitable movable plug, (not shown) and is provided for the purpose of permitting the cleaning and drainng of the coil or loops when` desired. As shown, the leg 2l extends above the leg 22 and is internally threaded as at 25 for the reception of the threaded portion 17 of the depending` leg ll. By this construction and arrangement the lower member 2O can be threaded on the upper member 10 as shown in the drawings. The leg 22 carries the right angularly extending cold water inlet 2S which is arranged in parallel relation to the hot water outlet i3. It is obvious that the lower member 2O can be threaded on Vthe leg il until the outlet and inlet members 18 and 26 are spaced the required distance apart after which the inlet and outlet members can be placed in the holes provided for that purpose in the furnace wall. The cold wat-er inlet 2o" is internally threaded for the vreception of the cold water supply pipe (not shown).

A packing nut 27 can be provided for preventing leakage between the tw-o mem ers and for holding the members in their proper adjusted position and this packing nut 27 is threaded on the depending leg ll and on the upper end of the leg 2l of the lowern member 20. Suitable packing material 28 is placed between the nut 27 and the upper edge of the leg 2l of said lower member.

The lower member 2O can be provided with radially extending struck out hollow ribs 29 which serve the Vsame purpose as the ribs 16, namely to increase the radiating surface of the coil or loops, to strengthen the member 20 and to space the coals and ashes from loops.

From the foregoing description, it can be seen that l havcprovded a novel heating coil or loop in which the two members carrying respectively cold wa er outlet and the hot water inlet can be readily adjusted relative to one another so as to span the distance between the, apertures provided for said inlet and outlet in the wall of the furnace.

Changes in detail be made without departing from the spirit or scope of the invention, but Y l/Vhat l claim as new is:

l. A hot waterloop for heating furnaces comprising an inverted L-shaped Vmember Vhaving a depending externally threaded leg at one side and a hot water outlet at its other side, a lower member including a U-shaped packing nut threaded on the externally threaded leg and said internally threaded leO.

z:2. A hot water loop for heating furnaces comprising an inverted L-shaped member having a depending externally threaded leg at one side and a hot water outlet at its other side, al lower member including a U-shaped lbody having an internally threaded leg at shallow flutes formed on said body communieating with the interior thereof and projecting beyond said body for facilitating the heating of the water in the body and to space the coals and ashes from the outer face of said body, said flutes being located inthe direct path of the water passing through the body to permit of a continuous flushing of the flutes and prevent the Vaccumulation of sediment therein.

4f. A hot water loop for heating furnaces comprising a body having a cold water inlet and a hot water outlet, and radially extending comparatively shallow hollow ribs constituting flutes formed on the outer face of the body and communicating with the interior thereof, said flutes being located in a position to cause the flutes to be flushed as the `water enters and leaves said body.

5. A hot water loop for heating furnaces comprising an inverted L-shaped member carrying a depending externally threaded leg at one side and a hot water outlet at the other side, a lower member including a substantially U-shaped body having an internally threaded leg at one side and a right angularly extending cold water inlet at its opposite side, and means for adjust-ably and removably connecting said first mentioned member and the lower membertogether.

ln testimony whereof I aliix my signature.

WALTER P. KIDD. 

